Guhring 9038990017800 Micro Drill Bit 1.78 Mm Carbide

Product Description

The GUHRING 9038990017800 is a solid carbide micro drill bit engineered for precision drilling in demanding metalworking applications. It features a 1.78 mm diameter with a 140-degree faceted point angle and a TiAlN coating that extends tool life in abrasive materials. The flute length measures 12 mm, with an overall length of 38 mm and a 3 mm straight-cylindrical shank. A web-thinned point reduces thrust load and improves centering accuracy at entry. This drill is designed for use by machinists, tool-and-die makers, and precision fabricators working with small-bore hole requirements.

This drill bit is suited for drilling cast iron and steel in production and maintenance machining environments. The 5xD flute-to-diameter ratio supports moderate-depth holes up to a maximum drilling depth of 9.33 mm. The right-hand spiral flute geometry promotes efficient chip evacuation in both CNC and manual drilling operations. Series 3899 positions this tool for high-precision micro-hole work where tight diameter tolerance and consistent geometry are required across repeated cycles.

Key Features

• Solid carbide construction in material grade K40 for rigidity and wear resistance in ferrous materials
• TiAlN coating improves heat resistance and extends cutting tool life in cast iron and steel
• 140-degree faceted point angle with web thinning reduces entry thrust and improves hole position accuracy
• Straight-cylindrical shank at 3 mm diameter fits standard collet and drill chuck toolholders
• h7 diameter tolerance on the drill body supports close-tolerance hole requirements
• Right-hand cut with regular spiral flute for consistent chip flow and surface finish

Compatibility

Designed as an OEM-style precision micro drill for use in CNC machining centers, drill presses, and manual machines equipped with toolholders accepting a 3 mm straight-cylindrical shank. Primary workpiece materials are cast iron and steel.

Installation Notes

Install this drill bit into a clean, properly sized collet or drill chuck and verify runout before cutting. Power down and lock out the machine spindle before changing tooling. Follow shop-standard speeds and feeds for solid carbide micro drills in the target workpiece material, as excessive feed rate is the primary cause of micro-drill breakage. Coolant-through is not supported by this tool; use external coolant or misting as appropriate for the material being drilled.